According to research, an excessive buildup of hydrogen peroxide is a primary cause of grey hair. This buildup bleaches the hair from the inside out and damages the melanocyte melanin producing cells Glutathione an overview ScienceDirect Topics Hydrogen peroxide functions as a stress signal in plants Reactive oxygen species, toxicity, oxidative stress, and antioxidants: chronic diseases and aging Archives of Toxicology Springer Nature Link The hydrogen peroxide (H 2 O 2 ) thus generated is rendered harmless by the action of glutathione peroxidase. triyambak.org Triyambak Life Sciences Measurement of superoxide dismutase, catalase and glutathione peroxidase in cultured cells and tissue Nature Protocols